Tim Porter, of the First Draft blog, has an excellent rundown of a new survey of American journalists. Demographics, specifically political affiliations, often arise in discussions of media bias. Porter says:

I hate the liberal-conservative press debate since it’s like arguing over the weather–and because I believe most newspaper journalists are reactionary (in the non-political sense) by nature, and therefore a root cause of newsroom stagnation. That said, the survey found that 37 percent of journalists identify themselves as Democrats, moving them closer to the national percentage of 32 percent. It’s the lowest number since 1971 (proving, perhaps, that the greatest Democratic recruiter in the last half-century was Richard Nixon).